main {
    height: 736px;
    background-image: url(../img/sign-bg.jpg);
    background-position: top center;
    background-repeat: no-repeat;
    background-size: cover;
    flex-direction: column;
}

#myform {
    p {
        margin-bottom: 30px;
    }

    #vf {
        width: 60%;
    }

    .vcode {
        margin-left: 20px;
        width: 25%;
        height:50px ;
        background-color: green;
    }
}
#tips{
    color: red;

}
